I got an 8m run on snake where my Drake tiggered for the whole 6 minutes on his first turn. Trigger ended a few seconds after time ran out.tried in raid, it works now~ but is purely rng, got 2 turn without ANY proc, and some times 1 turn lasted 2minute (the points is as much as ur dps!) means if have 13k drake, you are godly. if 8k atk like mine, still can dish out dmg just fine.I think its stated somewhere in the forum that double strike runes are not proced by kahuna's aura if youre using mikan's sdd team.
Double Strike is better.